Friction-gear.



J. R. MITCHELL.

FRICTION GEAR.

APPLICATION FILED oct. 18. 1915.

Patmlted Apr. 24,1917.

' 2 SHEETSSHEET I- IN VEN TOR.

T TTORNEY I. R. MITCHELL.

FRICTION GEAR.

APPLICATION FILED OCT- I8. I915.

1522,1219 I Patented Apr. 24,1917.

2 SHEETSSHEET 2- WITNESSES:

W W T TTORNEY i s a to.

JOHN 1R. MITCHELL, @F CHICAGG, ILLINOIS, ASSIGNOB, T0 WILLIAM H. MINER, (19F CHAZY, NEW YORK.

FEELICTIQN-GE.

Application filed October 18, 1915.

To all whom it may concern:

Be it known that 1, Joan R. l /lrronnnn, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Friction-Gears, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in friction gears.

An object of the invention is to provide a relatively cheap, high capacity friction gear for railway cars of efficient construction and so arranged that stop castings are rendered unnecessary. The invention, furthermore, consists in the improvement of the parts and devices and in the novel combinations of the parts and devices herein shown, described and claimed.

In the drawing forming a part of this specification, Figure 1 is a vertical, longitudinal sectional view of a draft rigging enibodying my improvements. Fig. 2 is a horizontal, sectional view of the structure shown in Fig. l the parts being illustrated in full buff. Figs. 3 and 4 are transverse, vertical sectional views taken respectively on the lines 33 and 41 of Fig. 1. .And Fig. 5 is a view similarto Fig 2 of another embodiment of my improvements.

In said drawing, and referring to the structure illustrated in Figs. 1 to 4, 1010 denote the draft or center sills of a railway car, the same being provided with elongated rear slots 11 for a rear slidable key 12, and front elongated slots 13 for the coupler key 14 which connects the links 15 with the draw-bar 1f}, it being understood that said links 15 are mounted on the rear key 12.

Located between the sills 10 and secured thereto, is a casting designated generally by the reference A, said member A being provided with a front friction cylinder 17 open at each end, a rear similar friction cylinder 18, and integral, longitudinally extending upper and lower horizontal flanges 19 and 20 on each side of the cylinders 17 and 18, said flanges 1919 having upwardly vertically extending portions 2121 riveted to the sills and said flanges 20 having downwardly ex tending portions 2222 also riveted to the draft sills 10. As clearly appears from Figs. 3 and 4, the upper and lower flanges 19 and s ecification Letters Patent.

Patented Apr. 24, 191W.

Seri No. 56,479.

20 form guideways for the side links 1515. Cooperating with each of the friction cylinders 17 and 18 is a set of friction shoes 23, wedge 24; and anti-friction rollers the sets of friction nlcchanisn'ls being opposite] y arranged as clearly appears in Figs. 1 and At the inner end of each friction cylinder is 'a follower 26, each follower having an annular boss 27 adapted to fit within the adjacent ends of the friction shoes. In normal position of the parts, the followers 26 are held in engagement with their respective friction cylinders by means of the main spring 28, the latter preferably consisting of nested coils as illustrated. A retaining bolt 29 extends through the friction mechanisms, followers 2G and main spring to hold the parts in assembled position and also the spring 28 under an initial compression. A saddle plate 30 is also employed, the same being bolted to the lower flanges of the draft sills and having a curved saddle 31 to support the spring 28 at its center.

Upon inward movement of the draw-bar 16, it is apparent that the friction mechanism at the front end of the gear comes into play, the main spring being compressed against the stationary rear follower 26. Under draft, the rear friction mechanism only, is actuated by the follower 32 carried by the key 12, the same spring resisting movement of the rear friction mechanism due to its. being compressed against the front follower 26 which is held stationary by the front friction cylinder 17.

In the form shown in Fig. 5, the arrangement of keys, links, draw-bar, front friction cylinder and friction mechanism associated therewith is the same as that illustrated in the other figures and a repetition of the description thereof is not deemed necessary. At its rear end, however, the casting A is provided with a hollow cylindrical shell or casing 118, which is open at both ends and, at its rear end, is provided with an inwardly extending annular shoulder 33 against which is normally seated a flange 34 formed on a block 35 extending through the opening at the rear end of the casing 118, said block being normally in engagement with the follower 132 on the rear key 112. A spring is interposed between said block 35 and the follower 126 which cooperates with the front friction mechanism. In bufl', the same action is obtain'ed as in the structure illustrated in- Figs. 1 to 4 of the drawing, but in draft, a spring action only is obtained which is effected by the forward movement of the block 35, thereby compressing the spring between it and the follower 126. In this forward'movement of the block 35, it is apparent that the latter is guided withinand by the casing 118.

From the preceding description, it will be seen that I do away with the use of stop castings. I employ only one set of springs to operate with both sets of friction mechanisms in the one instance and with the friction mechanism and block in the other instance. The friction shells are directly riveted to the sills, and the arrangement is also such that the device may be adapted for use on cars having narrower sill spacing than is now the standard practice.

I claim:

1. A member for draft riggings which comprises a casting having open ended shells at each end thereof, said shells being connected by integral,v longitudinally extending flange portions, the latter being adapted to be directly secured to the draft sills of the car.

2. A member for draft riggings which comprises a casting having open ended shells at each end thereof, said slrells being connected by integral, longitudinally ex-i tending flange portions, the latter being adapted to be directly secured to the draft sills of the car, both of said shells having interior friction facesadapted to cooperate with friction shoes.

3. A member for draft gears having open ended shells at each end thereof, said shells 40 being connected by upper and lower flanges extending longitudinally on each side of ing spaced and said upper and lower flanges bethereby adapted to form guideways for yoke acting members.

4. A member for draft gears havmg open ended shells ateach end thereof, said shells the shells,

being connected by upper and lower flanges extending longitudinally on each side of the shells, said upper and lower flanges being spaced and thereby adapted to form guideways for yokeacting members, each of said shells having an interior friction surface adapted to cooperate with friction shoes.

5. In a draft rigging, the combination with front and rear friction shells rigidly secured to draft members, friction elements cooperable with each of said shells, and a single spring interposed between said friction mechanisms and cooperable with each, one of said friction mechanisms being operable under buff only, and the other under draft only, said friction shells being connected by integral, longitudinally extending flanges.

6. In a draft rigging, the combination with front and rear friction shells rigidly secured to draft members, friction elements cooperable with each of said shells, and a single spring interposed between said friction mechanisms and cooperable with each, one of said friction mechanisms being operable under bufi' only, and the other under draft only, said friction shells being-connected by integral, longitudinally extending, upper and lower flanges, a draw-bar, and linksoperatively connected with said drawbar, said links being slidable between said upper and lower flanges. r p

In witness that I" laim the foregoing II have hereunto subscribed my name this 4th day of October, 1915. a

JOHN R. MITCHELL. 

